I'm not sure what the third axis would be. However, it is possible to put total revenue and new deals on the same view, each with their own axis. Place them side by side on either the columns or rows shelf, then right click on the measure to the right and select Dual Axis. If desired, you can right click again and select Mark Type--this will allow you to have a bar and a line for example.
Hope this helps!
Maybe you can use color mark to represent third dimension