Change position of figure in beamer

You could also use the textpos package.

\documentclass{beamer}

\usepackage[absolute,overlay]{textpos}
\usepackage{graphicx}

\begin{document}
\begin{frame}
\begin{textblock*}{5cm}(3cm,1cm) % {block width} (coords)
\includegraphics[width=5cm]{images/logo.jpg}
\end{textblock*}
\end{frame}
\end{document}

beamer doesn't really support floats as they don't make sense in a presentation. The figure environment is allowed but doesn't really do much.

\vspace*{2cm}
\hspace*{3cm}\includegraphics[width=0.15\textwidth,natwidth=69,natheight=87]{images/logo.jpg}

would probably do what you want, adjust the lengths to fit. Leave blank lines before and after these two lines to ensure you are in vertical mode, otherwise the \vspace will do the wrong thing.