Unfortunately that device is running a version of Android that does not allow for setting the SD card as "Internal" rather than the standard "External" which is what you would need to move apps to the card. The only current OS that allows for running the apps from the card, and making the card internal, is "Marshmallow". I don't think your device allows for upgrading to "Marshmallow" but you can always try.
The only other route I know of is to root the device. However that would void any warranty you have on the tablet. I can't help with rooting, should you choose to go that route, however you can find assistance on that option in the "Rooting, Jailbreaking & Unlocking" Forum.
http://www.tomsguide.com/forum/forum-117.html