What is an above average IQ for a 7 year old boy?

Your IQ never changes by more than one or two quotients your entire life, so his age is irrelevant. Anything above 100 is above average, but it is nothing really special if it is 110 or something like that. If you are testing him using an online IQ quiz, I suggest you stop. They are very unreliable and unstandardized. Visit a psychologist to have him tested, or ask the school about testing for gifted programs. Elementary school students are usually tested in grade 3, and are introduced into the gifted program in grade 4, if such programs are available in your school system. I hope this was helpful and made sense to you.