Refer to figure. 
Wind Correction Angle (WCA) is the angle from the track to the heading, i.e. it is the correction (left/right or -/+) that must be applied to the required track to compensate for the effect of the wind so as to get the heading to be flown.

WCA is equal in magnitude with the drift angle, but opposite in sign.

For this question, to find the WCA we need the Flight/Nav computer to find the required track, following the steps below:

1. Place the centre dot over the TAS 380kt.
2. Rotate the disc until the wind direction 060° is under the True index.
3. Mark the wind velocity 60 kt under the centre dot.
4. Rotate the disc again until the true heading: 085° + 5°E = 090° is under the True index.
5. The mark shows a drift of 5°R.
6. Thus, the WCA that must be applied is 5°L.