I found the solution at
How do I set my system path under Windows? - 1-15ZLK
c:\android\tools is where my adb.exe file was located
I also had to connect using PC Mode using the driver provided by Motorola
USB and PC Charging Drivers - Motorola, Inc. USA
Windows 2000, XP, Vista, Windows 7
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1. Right-click on the My Computer icon. (Under Windows XP, Vista, or Windows 7, the My Computer Icon may be located in the start menu.)
2. Choose Properties from the context menu.
(Alternatively, you can double-click on the System icon in the Control Panel)
4. Click the Advanced tab or "Advanced system settings" on Windows Vista or Windows 7
5. Click the Environment Variables button.
6. Click on the variable called 'Path' and then click on Edit. Now add the target directory to the value of the variable, using a semi-colon as a separator.
For example, if you want to add the path to MATLAB/bin to your system, which if located at c:\matlab\bin, you would enter the following at the end of the Path:
;c:\matlab\bin
7. Restart your computer for your changes to take effect.