Hi, My Son Is 13 Year Old And Is Measured

Hi, My son is 13 year old and is measured 152cm. He is one of the shortest in his grade. I am concerned about his height. He sleep about 8.5 hours a night. He only sleeps 7.5 hours, when he needs early rise. On the weekend, he sleeps over 9 hours. He eats normal. Just wondering if there is a way to check how much he can still grow and what we can help for his growth.
Your advice is very much appreciated.
Thank you,
Bianca