See here for average freshman stats by college within VT. http://ir.vt.edu/data/student/admissions.html
GPA is right in there, SAT is good too. I am sure VT does offer some academic scholarships to entering freshmen, you should also investigate other scholarships not offered directly by the college itself. It looks like your son has a good chance, though engineering is fickle sometimes in admissions. Being from NOVA increases the competition he’s facing. Tell him congrats and keep up the good work!