Learn how to push or pull columns for responsive displays: https://studiok40.com/using-push-pull-classes-with-visual-composer/
vc_col-sm-push-6 or vc_col-sm-pull-6
push goes in the left column to push it to the right
pull goes in the right column to pull it to the left
I also was able to push/pull with 3 columns col 1: vc_col-sm-push-4 col 2: no class col 3: vc_col-sm-pull-4