The graph of the function $f(x)=9 + \log_4 x$ can be obtained from the graph of $g(x)=\log_4 x$ by one of the following actions:

(a) shifting the graph of $g(x)$ to the right 9 units;

(b) shifting the graph of $g(x)$ to the left 9 units;

(c) shifting the graph of $g(x)$ upward 9 units;

(d) shifting the graph of $g(x)$ downward 9 units;

The domain of the function $f(x)$ is $x > A$, find $A$
The value of $A$ is
Is the range of the function $f(x)$ still $(-\infty,\infty)$?