Actually, males are to be 23-24 inches in height ideally, with an inch allowed either way. If you measured him accurately, he is within standard technically but he would be penalized for being outside the 23-24 ideal.
In reality, dogs outside that 23-24 ideal can have a more difficult time winning in the ring, especially those on the shorter side of it. You might also find yourself being wicketed (measured) in the ring, if another exhibitor or the judge feels he might be outside the 22-25 inch range.
If you want to show him, have fun and learn, I would first try to get an "official" measurement of him-your local kennel club should have a wicket used at shows that can be used. The wicket is often present for conformation training sessions that most clubs have. You can go and learn how to show your dog, have him measured, and work on getting him used to it in case he is measured in the ring. Then, go and have fun
In order to show in conformation, he will need to be on a Full AKC registration, so make sure he has a Full registration and not a Limited. Pets bred by reputable breeders are virtually always sold on Limited registration.
Just realized that your boy is from Asoro's-Ilene would be a great reference for you here. She could help evaluate him for conformation and ring-readiness, and even give you some advice regarding his height.