What's my ideal weight?

hi,

I am 24 year old having weight 81 kg & hight 5'11''
previoslly I do exercises but now fat deposited on my tummy & I am worried how to lose that.
please advise me ideal weight & way for reducing fat on tummy only?

you cant lose weight on just your stomach when you burn fat it burns from everywhere you cant target a specific as far as weight goes if you want to be really muscular my friend is 5'11 and about 210 lbs and has not fat on him but I mean im 5'9 and I weigh more then a lot of average 5'11 guys so it all depends but id shoot for maybe 185 to 190