Well Anita, you carry your weight very well. I'm 178cm tall and that was an advantage for me when I was at my heaviest of 93kg & tight size 18!
I know exactly what you mean about the tummy. That's one of the things I hate about me too! I've only had one child (he's 3 now), but I put on 25kg and got so many stretch marks on my tummy in the last trimester. I was really concerned about it when I first started my weightloss journey, but I must admit that it looks a hell of a lot better now that I've lost some and the stretch marks aren't as visible now, although they're still there! I am worried about loose skin, as I don't think that losing weigth and toning the tummy area will help it completely. We'll see though.
Good luck with your weight loss. You'll get there!