Is there anyway I can get Blockchain to confirm this?
No, Blockchain.info is just a service. They are not the Bitcoin blockchain nor do they have any power over Bitcoin. Confirmations come from miners and those miners are the only ones who decide whether your transaction goes into the blockchain or not.
What about if they use his account balance history to determine?
To determine what? That he sent the Bitcoin? Sure they might have it in their logs, but nothing can be done about it. For all intents and purposes, the transaction never happened and the entire Bitcoin network doesn't know that such a transaction existed.
If they can confirm it, then i can go back to him and say, blockchain says you got the money back, if not im going to have to eat the .75