No, you show to see how your dog meets the standard. It doesn't matter if he's not going to be bred. He's a "pet quality" dog and not "breeding/show quality".
Using surgical means to bring down a testicle just so you can show would not be ethical.
Just a question - CAN they do that??
It is my understanding that even if the testicle was brought into place it's still not a developed testicle.
It would be removed surgically and thrown away, to reduce the chance of cancer, the other testicle could be left in place if desired but then again, the dog should not be bred.