I am running a WordPress site, which is verified with Google Webmaster Tools and has a GA code associated with Google Analytics.
I\'ve done some research on the web
The syntax for UA event tracking is
ga('send', 'event', 'Phone Call Tracking', 'Click/Touch', 'Home Banner')
So your complete code would be
<a href="tel:18285053969" onclick="ga('send', 'event', 'Phone Call Tracking', 'Click/Touch', 'Home Banner');">828.505.3969</a>
Once you have that set, and if you are not filtering out your own views, you can check for the event hit in Real-Time reports (so you don't have to wait 24 hours to see if it's working).