Moving elements by y-, or x-axis is not possible, but feel free to vote for this function here…
Long time ago, i already opened a request for such a feature, but since there were not enough people who voted for this feature, it is still not available in Wix/Velo. It’s really a pitty, that there isn’t given such a feature in VELO/WIX. 
Here the link to the wichlist…
https://www.wix.com/velo/wishlist?page=3
And here the link to the mentioned voting…
https://www.wix.com/velo/requested-feature/moving-elements-on-page