Hello system32First, the meaning of the direction is that the force of 68 N makes an angle with the -direction. You can work out this angle in degrees if you like, but you don't need to. The hypotenuse of the triangle is exactly. So the sine of the angle is and its cosine is .

Now, to find the resultant force, add up their and components, taking as positive to the right, and positive upwards, using sines and cosines as appropriate. I'll do the one for you:

, where is the component of the resultant force.

Do the same for , the sum of the -components.

Then, using a right-angled triangle with sides and work out the magnitude of the resultant, using and the angle the resultant makes with the -direction, which is .

Grandad