I downloaded FileZilla and changed them in there. When I change it and hit ok it tells me:
Status: Set permissions of '/html/forum/phpBB3/store' to '777'
Command: SITE CHMOD 777 store
Response: 253 Attributes changed okay.
Status: Retrieving directory listing...
Response: 227 Entering Passive Mode (208,83,25,139,7,185)
Response: 150 Opening ASCII mode data connection for /bin/ls.
Response: 226-Maximum disk quota limited to 300000 Kbytes
Response: Used disk quota 18810 Kbytes, available 281189 Kbytes
Response: 226 Transfer complete.
Status: Directory listing successful
When I right click on it again to check the attributes, they are back to 666