Sounds like a good weight for your height to me. Maybe shave off five pounds and you'll be perfect but it also depends on how you're built.
Yes. Its good. And healthy.
Yeah that's healthy.
You should Ask your doctor. One good way to check is to calculate your BMI (Body Mass Index). It's not 100% Accurate but it's a good guide.
www.bupa.com.au/health-and-wellness/tools-and-apps/tools-and