That gives "ncmhroo" — not English either.
To decode, one can use frequency analysis: in English, common letters like E, T, A appear often. Comparing the ciphertext's letter frequencies with standard English frequencies helps guess the shift.
Here is a short on the topic: Title: Breaking Simple Ciphers – A Practical Approach
Actually simpler: try (shift +13):
s (19) – 3 = 16 → p h (8) – 3 = 5 → e r (18) – 3 = 15 → o m (13) – 3 = 10 → j w (23) – 3 = 20 → t t (20) – 3 = 17 → q t (20) – 3 = 17 → q
"gveakhh" — no.