Obtain the plot of the points for $0 \leq t \leq 6 \pi$ when the coordinates $x, y$, and $z$ are given as a function of the parameter $t$ as follows:

\[\begin{aligned}& x=\sqrt{t} \sin (3 t) \\& y=\sqrt{t} \cos (3 t) \\& z=0.8 t\end{aligned}\]