If you're giving directions like in this case, would bortenfor mean the same?
Both 'bortenfor' and 'nedenfor' mean 'past the restaurant', but 'nedenfor' also indicates that the terrain is lower.
You should also be able to say: "Ned forbi restauranten", which would be a perfectly good answer in norwegian!
"nede forbi restauranten" was accepted 24/10/2018