eating protein will not make you grow taller. the best you can
do to grow taller is to drink more milk for the calcium. but still,
you will grow maybe 2 -4cm taller, that's all. your height is
determined by your genes.
also don't have this misconception that 84g of protein is too
much. in fact, it is too meager, unless you weight <84 pounds of
course.
in order to build muscle, you should take 1g -1.5g per pound of
bodyweight.no wonder you aren't growing, the average man needs
65-80g. but the average man is not aiming to become big and strong,
you should take at least 150g.