Scotty
I need to know how to delete something in a drop down below the tool bar
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I'm not sure I understand what you mean.  I assume you mean you've moved something very low on the desktop that has accidently moved behind the dock.  There are a few different ways to get to this data to delete it.  

1.  You could select any item on the desktop then hit "tab" until the item you'd like to delete is highlighted.  Next you'll hit command (apple key on older computers) + delete to move it to the trash.
2.  Another way would be to open a finder window and go to the users folder then to your user name folder then to the desktop folder.  That item will be in that folder and you can drag that to the trash.
3.  Another way would be to move the dock to another side of the screen from the dock system preference pane inside system preferences.  

Hope that helps.