Your phone should be running Android "Lollipop" which would mean that only certain apps would be movable to the SD card.
To move the apps that 'can' be moved you would go into .... "Settings", then "Apps". In there you would select (tap) the individual apps and then tap "Move to SD card" or something similar.
However, the only way to move all your apps to the card would be to have a phone running "Marshmallow" as well as the manufacturer not having locked out that capability. Many have, even in "Marshmallow".