
The standard says 21 1/2 to 22 inches for bitches and 22 to 22 1/2 for dogs, so yes he is over standard, and his Mum is pretty much top height. I wouldn't think he would get any tallelr now, just fill out and mature.
Again his height is only one fault, and I don't know how heavily this is penalised in the breed ring or working cirlces, as obviously ttoo much over and under is likely to impact not only on breed type but functional efficiency for the work they are required to do.