TikZ code for making my figure showing the geometry for discussing multipole expansion

charge_figure.tex

\documentclass[crop,tikz]{standalone}
\usepackage{bbm,bm}
\usetikzlibrary{arrows.meta,bending,positioning,shapes.symbols}
\begin{document}
\begin{tikzpicture}[>=Stealth]
    \node[cloud, draw,
    fill = gray!10,
    minimum width = 6cm,
    minimum height = 4cm] (c) at (0.5,0.5) {};

    \draw[<->] (-2.5,-2) -- (3.5, -2) node[midway, below] {$d$};

    \draw[->] (xyz cs:x=0) -- (xyz cs:x=1);
    \draw[->] (xyz cs:y=0) -- (xyz cs:y=1);
    \draw[->] (xyz cs:z=0) -- (xyz cs:z=1);

    \coordinate (xvec) at (-10:8);
    \coordinate (xpvec) at (30:2);
    
    \draw[->, thick, blue] (0,0) -- (xpvec)
    node[above, text=black] {$\boldsymbol{x}'$}
    node[midway, above, text=black] {$r'$};
    \draw[->, thick, blue] (0,0) -- (xvec)
    node[right, text=black] {$\boldsymbol{x}$}
    node[midway, below, text=black] {$r$};

    \draw[->, green] (xpvec) -- (xvec) node[midway, above, text=black] {$\boldsymbol{x}-\boldsymbol{x}'$};

    
    \draw[<->, orange] (-10:1.5) arc (-10:30:1.5)
    node [midway, right, text=black] {$\gamma$};

    \node at (-1,.5) {$\rho(\boldsymbol{x})\neq 0$};
    \node at (5,1.5) {$\rho(\boldsymbol{x})= 0$};
    
  \end{tikzpicture}
\end{document}