How much should a thirteen year old boy weigh if he is four foot four?

a thirteen year old that's "4'8" is actually suppose to be around 105lbs. i know so becasue i just visited my doctor and said so. but its okay if your above that that just means you either have your period already and you've got your hips and breast.or you have muscle. but if your waaay above that then i suggest you should work on that because then your just obeses.:)
♥t-rex