Can i reach 6'3". i'm 5'8". if i eat a lot of calcium and sleep will i grow more?

Not at your age: There are several phases of sleep and one of the most important levels for maximum rest and renovation is delta phase. This is the deepest level of sleep in which hgh (human growth hormone) is released and in adults provides one of the most potented hormones that naturally helps prevent tissue and organ breakdown. In growing individuals, adequate hgh levels will insure proper growth.