1. The problem states that the abscissa (x-coordinate) of point $P$ is $-8$ and the ordinate (y-coordinate) is $19$. 2. The location of a point on the coordinate plane is given as an ordered pair $(x, y)$ where $x$ is the abscissa and $y$ is the ordinate. 3. Therefore, the ordered pair for point $P$ is $(-8, 19)$. 4. Among the given choices, this corresponds to Choice B: $(-8, 19)$. Final answer: $(-8, 19)$ (Choice B).