I agree - he should apply to the major he plans to pursue. But, go in knowing that most students change majors at least once. If he really doesn’t know, undeclared is OK for most schools. With his stats, SDSU, CPP UCR and UCSC are maybes. CPSLO, UCB, LA, SD, SB, I and D are pretty unlikely. UCM as well as the rest of the CSUs are likely to admit him. (if he’s interested in SJSU, study the threshold list by major linked above).
I’d look at Chico and Sac - as well as UNR,
Enjoy the ride and good luck to your son.