Count how many units are there on the x-axis first and in this case it is 5 the count how many on the y axis (going up or down) and that is 0 so then use this for the coordinate: (x,y)=(5,0)
If it says how long you spent in the bathroom, that should be factored in as well, in which case the answer would be 90-34-(time spent in the bathroom = your answer