The line $y = m x + 5$, where $m > 0$, is normal to the curve $y = 10 - x ^ { 2 }$ at the point ( $p , q$ ).
What is the value of $p$ ?
A $\frac { \sqrt { 2 } } { 6 }$
B $- \frac { \sqrt { 2 } } { 6 }$
C $\frac { 3 \sqrt { 2 } } { 2 }$
D $- \frac { 3 \sqrt { 2 } } { 2 }$
E $\sqrt { 5 }$
F $- \sqrt { 5 }$
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The line $y = m x + 5$, where $m > 0$, is normal to the curve $y = 10 - x ^ { 2 }$ at the point ( $p , q$ ).

What is the value of $p$ ?

A $\frac { \sqrt { 2 } } { 6 }$

B $- \frac { \sqrt { 2 } } { 6 }$

C $\frac { 3 \sqrt { 2 } } { 2 }$

D $- \frac { 3 \sqrt { 2 } } { 2 }$

E $\sqrt { 5 }$

F $- \sqrt { 5 }$