If it says sent then it has successfully transferred to the email address that you sent it to that is linked with an open and confirmed paypal account.
HOWEVER if it says SENT then it sounds as if you used the friends/family option?
If so then i hope it was not for a purchase of something as its a scammers trick to ask for payment that way and then pretend that they have not received it for some reason knowing you negated your buyer protection and can't do anything about it to get your money back.
Advice is voluntary. Kudos / Solution appreciated.