Plesk Panel does not have a graphic environment for file extraction. This can be achieved via SSH environment by using an equivalent client http://www.angellight.com/dl.php?type=d&id=107.
To extract a tar folder: tar -czvf filename.tar.gz /path/to/folder/
To compress the current folder in a tar file: tar -czvf filename.tar.gz *
To extract a tar file: tar -zxvf filename.tar.gz
To extract a zip file: unzip theziparchive.zip