My dad has 8 ethereum in a MEW account he forgot about..

My dad recently told me he has 8 ETH tokens in an account he can’t seem to access in MyEthereumWallet.com but kept the print out of the address and private key. Apparently he’s tried contacting MEW and there’s no one there to support. I’ve never used MEW myself but I want to help him get access to his money. I have a Coinbase account but I’m not super familiar with how this works. Is there a way to use the keys to transfer the funds to cash out?