If the private key is bip38 encrypted, you might need to decrypt it by downloading the sourcecode from https://www.bitaddress.org and going to "wallet details"
Once you have an unencrypted private key, go to electrum, go to wallet => private keys => sweep, enter your private key, and sweep your paper wallet.
Had a party last night, had a bit much to drink when i made this post... Can't believe i skipped the "best to run the code from an offline pc"-part
Thanks for adding this
Btw: a little addendum, you could use unetbootin (just google this) to create a live linux usb to boot from (for safety). Also, once you've swept your paper wallet, consider it compromised and never use it again to store funds on