Step 1: Understanding the Concept:
In the reversed alphabet ($Z, Y, X...A$), "from the right" means starting from A and moving toward Z.
Step 2: Detailed Explanation:
1. The $9^{th}$ letter from the right in the reverse series is the $9^{th}$ letter of the original series ($A, B, C, D, E, F, G, H, I$). So, the letter is I.
2. Now, find the $5^{th}$ letter to the left of I in the reversed series. In the reverse series, "Left" means moving toward Z.
Step 3: Calculation:
Moving from I toward Z (Left in reverse series):
1st: J, 2nd: K, 3rd: L, 4th: M, 5th: N.
Step 4: Final Answer:
The letter is N. Thus, the correct option is (b).