No iPhone icon in iTunes
I just updated my iPhone 6 to 8.4 and my macbook pro 13' (no retina) to the newest OS. The new iTunes was also updated and now when I plug my phone (as well as I have tried various other devices, ports, cords), no device icon shows up (suppose to be to the right of the three dots). I have tried all the steps found in this link
https://support.apple.com/en-ca/HT204095
I've done a hard reset on my phone, and reinstalled iTunes from the apple website. I also contacted apple support and the senior advisor hasn't replied. I'm really stuck on what the issue is and wondering if it is a software issue. Any help would be appreciated!
MacBook Pro, OS X Yosemite (10.10.2)