Answer
"MOVE OUT AT DAWN"
Work Step by Step
This cipher has a shift value of 5 ($s=5$)
$\implies$ We can create a table as follows: (attached image)
Basically, to start with A at the 5th from last place, i.e., from V.
$\implies A = V, B = W, C = X, D = Y, E = Z, F = A, G = B,$ and so on.
Using this table as a reference, we get:
RTAJ TZY FY IFBS = MOVE OUT AT DAWN.
