The WJ-III scores are all above average, which is great. If you are thinking that he should be at the 98-99% percentile for everything, then you probably have to work more with him at home and talk to his teacher.
For example, Calculation scores above could be if he knows his math facts cold. Or work more on his spelling at home.
My gifted second grader is hearing-impaired. Many hearing-impaired kids have trouble spelling (he doesn't). Every week, I do 10 spelling words that I download from the internet- I have him spell them for me daily. It takes 3-5 minutes a day. After a year, that is 400-450 new words he can spell! Maybe your son just needs a little extra tutoring from mom at home. HTH.
