If you are a new seller and subject to the 21 day payment hold then normally funds are released after feedback is left (however that does not mean instantly, it can take them a while to check), or if you entered a tracking number that proved delivery of the item to the buyer or if 21 days elapsed and no dispute has been raised.
However as your buyer has left pos feedback i would email paypal customer services via contact us bottom of paypal pages and ask for the release of funds.
Advice is voluntary.
Kudos / Solution appreciated.
