I had my ArmA 3 server moved to a different location and now my server has a whole new IP address and Port. But for some reason I can't delete the old server information for gametracker. And for the new server it says unable to scan server. The gametracker banner is just blank.
In the forums it says to change the query port but the whole thing changed not just the query port. So how do I update the entire connection information for my server.

For deleting your old server - you can do this on the "Manage" page. This is the page you would have claimed it on. The delete button may be disabled in some cases, in which case the only option would be to wait for it to be automatically removed after extended downtime.

For your new ARMA3 server, the following thread will help you determine the proper query port:

http://www.gametracker.com/forums/forum.php?site=1&thread=94907

If you're still unable to add it successfully, it would be recommended you contact your host to ensure the respective port(s) are open in the server firewall.