I am currently the same weight (85kg/187lbs) that I was at the start of my final year of high school (1991). In that year I lost 10kg to get myself under the maximum weight required for acceptance into the Air Force, resulting in a final weight of 75kg/165lbs.
At the time I wasn't quite at my full height now, so that sounds about right.
I'm doing it! I'm happy with that.