The latest research indicts that most traditional weight/height indication charts are too light in their calculations so adding a few kilos to them would be a good idea. Miller would have you at 78.6kg, Robinson at 82.2kg and Devine at 86.6kg.
When I set my weight goal target I used the healthy BMI range. Healthy BMI 18.5 - 25 range for you would be between 68.9kg and 93.3kg.
I set my goal weight at just above the half way mark.
However I didn't factor in the extra weight of the loose skin at the time (something that the charts understandable don't consider).
So once I reached goal I revised my maintenance weight slightly high to allow for the loose skin weight.
You are relatively younger than I was so maybe your skin will "bounce back" better than mine did.
My judgement is that 90kg is a good conservative weight for you to aim at.
Back yourself and just go for it!
But in the end...it is your decision - and your choice.
Being that I'm a 34 year old male with a solid build, standing 193 cm tall, I would look malnourished at 69 kg.
You are "solid build" - but that is the whole point...that is what you are trying to change.
Overweight people are "solid built" and "big bones" (the body makes it bigger in order to support the extra load) not by nature but because of unhealthy lifestyles. 69kg is the lowest end of the scale...any less and you do start to travel into underweight and unhealthy territory.
At the moment your mind can't actually grasp the reality of what a normal sized you would look like.
If I was to show you a future picture of it you would reject that as being too skinny. You see, the mind is playing tricks with how you look like now. In your mind's eye you see yourself as "overweight but not too bad".
Towards the end of my weight loss journey, my wife pulled out some photos of me just before I started to lose weight.
My wife and myself were shocked by them. It seemed to us that someone had widen the pictures of me in Photoshop.
I knew I was big - but not that big!
My mind had stopped looking at my fat self and started to see what real normal looked like.
This trick of the mind goes a long way to explain when I was big why I would misjudge my ability to squeeze between parked cars in car parks.
Towards the end of my weight loss journey many of my friends became concerned about me losing too much weight.
They too had entered into the mind illusion and because many of them didn't see me daily, it took them a while for their minds to catch up with reality.
So you see looks can be very deceiving. Best to go with hard facts and numbers instead.