I'm 16 years old whose 4'11,is it healthy/unhealthy that i weight 92 pounds? how much should i weight for my age and height?

Considered normal: This Ht/wt match places you in the normal weight for height range by both BMI and CDC growth chart criteria. As you are likely aware, you are shorter than most of your age equivalent peers, but that comes with the need to weigh the appropriate but smaller amount than most of them. You could weigh more and stay in the normal range but any less and you would be considered underweight.