What is the average weight for a 4' 4 10-year-old boy?

Who wants to go for average anymore. A lot of kids are obese. So average will be skewed. We should aim for ideal. My 10 year old son is 4'8" and weighs 90lbs. He's got a bit of chubbiness to him but not too bad. I think ideal for this age and height would be about 80-85lbs.