Move multiple items in viewport by a specific distance

so let say you have three objects in your scene at locations (x,y,z).

a. 10,10,25
b. 13,83,94
c. 86,63,96

and you want to move them to

a. 10,10,15
b. 13,83,84
c. 86,63,86

So basically move them all down by ten units.

Is there a way to do this without doing them all individually. i.e. select them all and just move them all together down 10 units.

My situations is that somehow I have managed to move my near completed level (477 objects) up by 11.133301 in the Z.

can’t you just select all your objects in the world outliner and then drag it to where you want?

Not that i can see. I can select all of my objects but cant see how to move them all down by exactly 11.133301 in the z axis in respect to their initial position.

if you put -11.133301 in the transform box it moves everything to the location -11.133301 not the origional location minus that amount.

Hm, there are 2 options,
Take each model per hand, take the location of the Z you wanna change, put it in for each and its done.
Sadly you cant take serveral models and just type in the change, but you can set up and … a visual clue where your wished for hight is, and than select all models and move them to the hight you want to have them.

Thanks for the advice, I ended up moving everything one by one as everything was positioned in specific places.