Answer:
It is 475m from the sea level.
The shark is 762m away from the sea level. Then it displaces a distance of 412m towards the sea level making its new diatance 350m away from it. From that point it then dives a distance of 125m, adding the distance of 125m to the 412m, making the new distance inbetween the shark and the sea level 475m.
