Answer
$ N 56.3^{\circ} W $
Work Step by Step
The trigonometric ratios are as follows: $\sin \theta= \dfrac{opposite}{hypotenuse}$ ; $\cos \theta= \dfrac{Adjacent}{hypotenuse}$ and $\tan \theta= \dfrac{Opposite}{Adjacent}$
Since, $\tan \theta =\dfrac{9}{6}$
This implies that $\theta =\tan^{-1}\dfrac{9}{6}=56.3^{\circ}$
So, the bearing measurement is: $180^{\circ}-36.9^{\circ}-67.4^{\circ}=56.3^{\circ}$
So, our required answer is: $ N 56.3^{\circ} W $