@Kat919 - I've seen it both ways. Some people say that raising your hands too high will hurt your shoulder, while others say that raising up to just above your shoulders is how to really build deltoid muscle.
I'm not an expert, but I always follow the rule of listening to your body. If you work out, you probably know the difference between "good" pain (i.e., fatigue) and "bad" pain (something going wrong). Personally, I don't lift my hands higher than mu shoulders because my shoulder "pops" when I do that. I figure popping sounds are bad, and I try to avoid them!